Photograph-printing machine.



G. KRAIN. PHOTOGRAPH PRINTING MACHINE.

APPLICATION FILED MAR. 25, 1912.

Patented Apr. 22, 1913.

4 SHEETS-SHEET 1.

I INVENTOR 277 0% BY Q w 4 I {9? 5t) -c ATTORNEV G. KRAIN. PHOTOGRAPH PRINTING MACHINE.

A'PPLIUATION FILED MAR. 25, 1912.

- Patented M31222, 1913.

4 SHEETS-SHEET 2.

\VITNESSES l 4% 4; ii

ATTOR N EY G.- KRAIN.

PHOTOGRAPH PRINTING MACHINE.

APPLICATION FILED MAR 25, 1912. I

Patented Apr. 22, 1913.

4 SHEETS-SHEET 3.

m BY QIJLIENTOR AT'I'ORNEY G. KRAIN. PHOTOGRAPH PRINTING MACHINE.

APPLICATION FILED MAR. 25, 1912.

' Patented Apr. 22, 1913.

4 SHEETSLEHEBT 4,

INVENTOR WITNESSES ATTORNEY GEORGE KRAIN, OF CHICAGO, ILLINOIS. I

Pl-loToGRAPH PRINTlN G MACHINE.

Application filed March 25, 1912. Serial No.

To all whom it may concern Be it known that I. Gnome KRAIN, a subject of the Emperor of Germany, and a resident of Chicago, in the county of Cook and light embodying a usual mantle, and which 0 State of Illinois, have invented a certain is adapted to be connected with a source of new and usefullmprovement in Photographgas supply by means of a pipe .3. Air to Printing Machines, of which the following support combustion is adapted to enter the is a specification. casing A through a suitable hole or opening This invention relates to pl1otography,and therein, as shown, a hole 4 formed in the as relates particularly to photograph printing, bottom of said casing directly beneath the machines. r light 2, and the burned gases are adapted to The object of the invention is to provide escape through a pipe 5, which communia machine for printing photographs which cates with a discharge opening formed in shall be simple in construction, reliable in the top of said casing directly above said its operation, and which shall have capacity light. for printing a large number of photo- The interior of the casing A is-divided graphs, thereby materially reducing the cost into front and rear compartments a, a by of producing photographs in quantities. an opaque partition 6 provided with a cen- To effect theobjects of the invention, a tral light opening 7, which is controlled by photograph printing machine of my invention comprises the various features, combinations of features, and detailsk of construction hereinafter described and .ClilllllGh and bottom sides of which converge rearwardly, the relation being preferably such that the front and rear ends of said casing will be central with each other.

Specification of Letters Patent.

mechanism, as presently described.

I Patented Apr. 22, 1913.

ing is preferably done by means of an artificial light 2 located at the front end ofy said casing, consisting, as shown, of a gas a shutter 8 hinged to the lowerside of said light opening, and which is adapted to be opened and closed at intervals by suitable As The negative 1' is adapted to be remov ably secured to the front side'of the frame 10 by any suitable means. Simple means for this purpose (see Figs. 1 .to 6) con- In the accompanying drawings, in which shown, the partition 6 is elongated and the a photograph printing machine of my insides thereof flare rearward'from the light vention is fully illustrated, Figure 1 is a opening 7 therein, the rear edges ,of said side view of a machine of my ii vention; part tion being secured to the walls of the F ig'. 2 is a rear end view thereof. Figf3 casing A so as to form tight joints entirely is a sectional view taken substantially on' 'the around said partition. line 33 of Fig. 2, the driving mechani 'm e rear end of the casing A is open, and being omitted; Fig. 4 is a detached rear forined on the rear end thereof and surview of the frame. in which the negative rounding said opening is a hollow rearward supported.- Fig. 5 is a side view therep f. ext sion 9, adapted to be removably se- Fig. 6 is a sectional view. on the line '6-6 of cured in which is a frame 10 for supporting 9Q Fig. 4. Figs. 7 and 8 are side and front end the negative 1 and certain operative parts views of the partition interposed between of the machine, as presently described. As the 'light and the negative, together with shown, the top side of said rearward extenthe shutter for controlling the light opension 2 is hinged at one end to provide coning therethrough; Figs. 9 to 13 inclusive venient access to. parts inclosed therein, and are detached detail views of various parts for conveniently inserting the frame 10 into of. my improved machine; and Figs. 14 to Land withdrawiiig it from said extension 9 16 inclusive illustrate modifications of cerwhen desired, as for the purpose of. changtain parts of my improved machine. ing the negative. As shown, said frame 10 Referring'now to the drawings, A desigis removably secured in the rearward casnates, as a whole, the body-portion of my ing extension 9 by means of engaging improved machine, consisting, as shown, of tongues and grooves formed vertically in 'a hollow box or casing rectangular in crossproper position on the inner side of the section, the rear end of which is smaller, rearward extension 9 and the lateral edges vertically, than the front end, and the top of the framelO, respectively.

at the rear end of the casing A, in the mansist ofclamp'ing bars 11, formed at oppo 11Q site ends of which are clips 12 which areadaptedto egc'tend inwardlyover the edges The negative 1 is adapted to be mounted ner presently to be described, and the printerate in an obvious mannei' to draw theclips'12 into frictional engagement with the outer side of the negativel and to clamp the same firmly against the inner face of the frame 10, in the manner desired.

sensitized paper, on which the photograph is to be printed, a sheet of which is shown at 15, is adapted to be inserted'into the machine directly behind the negative 1 through a suitable hole or opening 16 formed in the top side of the casing extension 9' andbf the frame 10, and is adapted to be'discharged therefrom into a magazine 17 secured to the under side of said casin in proper position through openings 1% formed in the lower side of the frame 10 and of the casing extension 9. Also, to

;extend above the top of the casing exten- 'sion 9. The'sensitized sheet 15 is'adapted to: be pressed firmly against the. rear side of the negative 1 by means of a presser plate 20 slidably fitted to an opening 21 formed through the frame 10, so as to be freely movable in said opening toward and from the negative 1, "a sheet 22 of felt or the like being preferably secured to the front side of said presser plate which bears against said sensitized pa er.

The positioh'lo the sensitized sheets 15 in the-machineis defined by means of a stop said sensitized sheets are dropped through plate 23 hingedjto the upper end of brackets 24 secured in a slot or opening 25 formed in the' lower side of the frame 10, and which rojects forwardly into close proximity with the rear'slde' of the negative 1, so'that when the opening 16, th? will fall an'drest upon said stop plate. he hinged stop plate 23 is maintained normally in raised, cperatite position by means-of springs 26 applied at the hinge thereof. Said stop plate is adapted to be turned pivotally d'ownward to permit'the sensitized sheets 15 to pass same and fall, through the opening'18 into the magazine 17 by means of an arm 27 secured to under side of the stop plate 23, a pin 28 secured in the end of which, en gages a slot 29 formed in a lever 30 prw otedon the brackets 24, the relation being such that rearward pivotal movement of the upper end of the lever 30 will depress or draw down the free front edge of the stop plate 23.

"In the preferable c onstruction shown, the operation of the lever 30 and thus of the stop plate 23-is controlled automatically by movement of the 'presser plate 20 toward and from the negative. 1 in the following mannerz-Pivoted to the rear-side of said presser plate isa trip finger-31, the lower end of which extends downwardly beyond the upper end of the lever 30 in position toengage the same when the presser plate 20 is moved rearwardly, the relation being such that travel of the presserplate in the operation of the machine will cause the trip finger 31 to ride over the upper end of the lever 30 just before said presser plate reaches the limit of its movement rearward,

thereby releasing the same, and permitting it to resume its normal raised position independently of the movement of the Presser plate 20, so that said stop plate will be in position to arrest the downward movement of the sensitized plate 15 while the-pressei" plate is still retracted to permit said sensi-- tized sheet to pass down with its lower edge resting on said stop plate 23. The stop finger 31 is made of such length also that,

trip finger and also operating to throw said finger down after lever'30. I

In its movement toward and from the negative 1, the presser plate 20 is supported and guided by meansof blocks 33 rigidly its free endpasses said secured tothe ends of said presser plate,

which are slidably' fitted to corresponding grooves formed in plates 34 secured in recesses formed in the inner lateral sides of. the frame 10. The blocks '33 are extended rearwardly so that they will project beyond the rear end of the casing extension 9 in all positions of the plate 20, and formed there on, are laterally projecting arms 35 which, project outwardly beyond the-router side walls of the casing A of the machine.

The bottom bf the magazine 17isclose d by a drawer 40, into which the printed Sheets," .settle as they fall into said"magazine from the machine.

The shutter 8 is' hinged by means of bracket hinges 41'at a considerable distance .below the light opening 7 so that, in flopeny ng, a throw will be imparted to said shutter which will carry it bodily away from the light openmg. Said shutter-is maintained normally closed by a spring 42 'ap lied to the hinge thereof, and is adapts to be opened by suitable means provided for the pu pose.

in the preferable construction shown, the

under side of the casing A and which ex tends upwardly through an o ning 48 in the bottom of the casing A. T e upper end of saidv lever is connected to the shutter 8 at a point closely adjacent to its hinge by a link 49 and its lower end projects into the path of travel of the cam 44, whereby necessary pivotal movementwill be imparted to said lever to open the shutter 8 at each revolution of said cam. As soon as said cam passes out of engagement with said lower, said shutter 8 will be closed very quickly by the spring 42 applied thereto. To provide for varying the exposure of the sensitized sheets 15 to the action of the light, said cam 44 is constructed in such manner that its face may be lengthened and shortened. As

shown, said cam is made in two separate sections, designated, respectively, 44 and 44., Fig. 13, the section 44 being firmly secured to .the shaft 43, and thesection 44 bei pivoted on said shaft and being adjustab y connected to the section 44, said connecting means, consisting, as shown, of a clamping screw 50 which extends through a slot 51 formed in the cam section 44, and is threaded into a hole formed in the cam section 44'. WVith the described construction,

it is obvious that the face of said cam and thus the exposure of the print may be varied within limits ranging from about one-fifth to one-third of -a revolution of the cam shaft. 1

The mechanism for operating the presser '1 plat 20 comprises levers 52 pivoted between their ends to opposite sides of the casing A. The lower ends of saidlevers 52 are connected by a bar 53 formed on which are arms 54 and 55, of which the upper end of the arm 54 is pivoted to the bottom of the caslng A and the arm 55 coiiperates with the cam 45 to impart rocking movement to the bar 53 about the pivot ofthe arm 54, which will, in turn, impart pivotal movement to the. levers 52. The upper ends of the levers 52 are connected with the arms 35 on the guide blocks 33 secured to the presser plate 20'' by rods 56, the opposite ends ofwhich are pivotally connected to said levers 52 and arms 35, respectively. adapted to be moved pivotally to advance the presser plate 20 to cause it to bear a f inst the sensitized sheets '15 by springs 5 which connect the upperends of said The levers 52 arevarying the time during which the presser plate will be held in retracted position to afford time corres onding to a greater or less part of a revo ution of the shaft 43 in which .to insert a sheet 15 into the machine.

Thus, when the machine is running fast, said cam will usually be adjusted longer than when the machine is running slower.

'To provide for convenientl disengaging the rearends of the rods 56 rom the arms 35 on the presser late 20, the pivot bearings in said rods whicii. engage the bearingson said arms are slotted so that they may be raised out of engagement with said arms and disconnected therefrom. As reviously described, the stop plate 23 is epressed automatically by the rearward movement of the presser plate 20, and hence is controlled by the cam 45.

In the operation ofthe-machine, the shutter '8 and the presser plate 20 are operated alternately, this being effected by positioning the cams 44 and 45 at angles of about 180 degrees from each other. To provide for varying the rearward movement of the presser plate relatively to the closing of the shutter 8, the rods 56 are adjustably con nected to the levers 52, as by studs 58, rotatably secured in the ends of said levers, and which extend through slots 59 formed lengthwise in the ends of said rods 56, and

are adapted to be secured in adjusted positions therein by means of clamping nuts 6 threaded to the ends of said studs outside of said rods, which are adapted to be clamped between said clamping nuts 60 and collars formed on said studs inside of said rods. Obviously, by adjusting the positions of said studs 58 in the slots 59 toward oiufrom the. ends of said rods, the angular positions of the levers 52'will be changed'so .thatthey will be engaged by the cam 45 at an earlier or later point-in its cycle. 5

" The sensitized sheets 15 are fed to the ma; chine by hand, as from a stack of such sheets supported on the top ofthe casing A, a

bracket 61 being secured to said casing to} support said sheets; i

The cam shaft 43 is preferably driven by means of a usual form of friction drive,

comprising a friction whee 62 splined tosaid shaft, the face of which runs in contact with a surface of a rotatable disk 63, which is adapted to be driven as from a driving shaft 64 adapted, in turn, to be driven from any suitable source" of power, not shown,

by-means of a" gear 65'on said shaft, rotation being imparted to .said disk 63 by means 1 f of beveledgears 66 and "57, secured tosaid I driving'shaft 64 and to the shaft of the disk 83, respectively. By adjusting the friction scribed in detail.

In Figs. 14: and 14:, 15 and 16, respectively, I have shown three dit'fegent forms of negativeholders adapted for holding negatives smaller than those which this machlne is normally designed to print from,

' and which I will now describe in order.

. Referring to Figs. 14 and 145*,the holder therein shown is adapted for printing negatives l centrally on sheets of the same size 'as the sheets 15. To effect this end, said holdercomprises bars 68, which are substantially identical in construction with the clamping bars 11, heretofore described, and areadapted to be secured to the frame 10 in the same manner. Formed on' lateral projections 69. on said bars 68 are bearings 70, in which are journaled screws 71, one at each end of the frame '10. "The opposite ends of the screws 71ers screw-threaded with screws of the saiiiepitch andopposite lead, one right-handed and the other left, and secured in screw-threaded engagement therewith "and positioned symmetrically above and below the transverse center line of the sensitized sheet when in operative position in the machine, are nuts 72 and! 3, formed on which are project-ions 74, slots in which slidab1y embrace the adjacentedges of the bars 68 and secure said nuts from turning-on said screws 71. Pivoted to the outer sides of said nuts are arms 7 5, which are pivoted to each other between their ends, the relation being such that corresponding sections of said arms on opposite sides of their points of pivoted connection to each other will be of the same length. Pivoted to the outer ends of said arms 7 5' are caps 7 6, comprising sections which extend at right angles to each other and are grooved or channeled on their inner sides, as shown at 77, to receive the corners of the negative 1. An end of the screws 71 is squared to receive a wrench 78, which affords convenient means for turning said screws'to adjust the arms 75 and caps 76 to receive negativesl of diiferent I so sizes.

With the described construction, the outer ends of the arms 75, to which the caps 76 are pivoted, will be spread apart by turning said screws 71 in one direction, and will be moved together to cause saidcaps 76 to grip the corners of the negative by 'turning said screws in the opposite direction. The negative will be inserted into the holder and the screws 71 tightened while the frame 10 is removed from the machine, the necessary adjustment being made, the screws 71 tightened, and the wrench or crank 78 removed slight modification of the plate holder shown in Figs. 14, 14, to adapt the same for printing on small sheets from. small negatives.

As the positions of the sheets to be printed in the machine are defined by the stop'plate 23, it will, of course, be necessary to vary.

the positions 'of the negatives from a fixed lower limit defined by said stop plate. Ex-

cepting as hereinafter pointed out, the device shown in said Fig. 15 is substantially the same in construction, and the same reference numerals are used to designate similar parts thereof. To effect the object thereof, said modification consists in utilizing screws 71 having the same lead throughout,

threaded to each of which is a'single nut 72,

to which one-of the arms is pivoted, the other of said arms being pivoted to a fixed part-of the bars 68 adjacent to their lower ends. In order that the small sensitized sheets may be delivered'in proper position between. the negative and the presser plate,

suitable guides are provided, consisting, as

shown (Fig. 15), ofplates 79 secured to the front wall of the hopper 19, and which ext'end down into close proximity to the plate 1-, '1 said plates being grooved in their adjacent edges to receive the ends of the sheets to be printed. "As shown, said guides 7 9'are secured to the front wall of the hopper 19 by means of clamping bolts or studs 80 whichextend through a ,slot 81 formed in the hopper wall, thereby making provision for adjusting said guides 79 laterally to re ceive sheets-of paper of different lengths.

of similar construction will bensed at'the' opposite side of the machine.

'Thelengths of said guides will vary, how- In Fig. 16 of the drawings, I have shown still further modification of my invention to adapt the machine for printing from a number of small negatives at the same time. To effect this end, I employ a skeleton frame 82 of about the size of the full-size negative 1, with which the machine is designed to be used. Secured in' the opening 83in said frame 82 are a' plurality, as shown, four negatives 1 Said ne atives are secured in position by meansio rods '84, the edges of which are grooved to receive the edges ilsaid negatives and the ends of which are slotted to embrace the sides of the frame 82 at the sides of. the opening83 therein;

I claim 1. In a photograph printing machine, the combination of a hollow casing, a light at one end thereof and a negative holding frame at the other, means for securing a negative to said negative holding frame, a

presser plate movable toward and'from a negative secured to said negative holding frame, a hinged stop for defining the print-- ing position of the sensitized sheets, means for imparting movement to said presser plate, a spring applied to said hinged stop, and means controlled by movement of said presser plate for imparting pivotal movei ment to said hinged stop against the force of the sprin applied thereto, constructed and arrange for releasing said hinged stop before said presser plate reaches the limit of its movement, substantially as described. 2. In a photograph printing machine, the combination of a hollow casing, a light at one end thereof and a negative holding frame at the other, means for securing a negative to said negative holding frame, a

presser plate movable toward and from a negative secured to said negative holding frame, a hinged stop for defining the printing position of the sensitized sheets, means for imparting movement to said presser plate, a spring applied to said hinged stop, and means controlled by movement of the presser plate for imparting pivotal movement to said hinged stop against the force of' the spring applied thereto,- said means comprising a pivoted lever, an arm on said hinged stop, a projection thereon which engages a slot formed in said pivoted lever, and a trip finger pivoted to said presser plate in position to engage the free end of the pivoted lever connected to said hinged stop, substantially as described.

3. In a photograph printing machine, the

combination of a hollow casing, a light at one end thereof and a negative holding frame at the other, means for securing a negative to said negative holding frame, a presser plate movable toward and from a negative secured to said negative holding frame, a hinged stop for defining the printing position of the sensitized sheets, means for imparting movement to said presser plate, a spring ap lied to said hinged stop, and means contro led by movement of the presser plate for impartingpivotal move npentto said hinged stop against the force 0 the s ring applied ,thereto, said means comprisi g a pivoted lever, an arm on said hinged stop, a projectieh thereon which engages a slot formed in said pivoted lever, and a trip finger pivoted to said presser plate in position to engage the free-end of the pivoted lever connected i'to said hinged stop, the relation being such that said trip finger will pass out of engagement with said Y lever before said presser plate reaches the limit of its movement, substantially as described. i

4. In a photograph printing machine, the combination of a hollowcasing, a light at one end thereof and a negative holding frame at the other, means, for securing a negative to said negative holding frame, a presserplate movable toward and from a negative secured to said negative holding frame, a hinged stop for defining the printing position of the sensitized sheets, means for imparting movement to said presser plate, a spring applied to said hinged stop, and means controlled by movement of the piess'er plate for imparting pivotal movement to said hinged stop against the force of the spring applied thereto, said means comprising a pivoted lever, an arm on said hinged stop, a projection thereon which engages'a slot formed in said pivoted lever, and a spring pressed trip fingerpivoted to said presser plate in position to engage the free end'of the pivoted lever connected to said hinged stop, the relation being such that said trip finger will pass out of engagement with said lever before said presser plate reaches the limit of its movement, substantially as described. v 5. In a photograph printing machine, the combination of a hollow casing, a light mounted at one end of said casing, a negative holding frame at the opposite end of said casing, adjustable means for securin a negative thereto, said means comprising bars secured to said frame, screws rotatably mounted in hearings on said bars, pairs of arms pivotally mounted on said bars respectively and pivotally connected to each other, each pair comprising an arm pivoted to a nut threaded to the screw on the bar to which said pairs of arms are pivoted, respectively, and negative engaging means at the outer ends of said arms, substantially as described.

6. In a photograph printing machine, the combination of a hollow casing, .a. light mounted at one end of said casing, a negative holding frame at the opposite end of said casing, adjustable means for securing a negative thereto, said means comprising bars secured to said frame, screws rotatably mounted in hearings on said bars, said screws' comprising upper and lower; sections having opposite lead, nuts threaded to both sections of said screws, arms pivoted to each other and to said nuts, and negative engaging means at the outer ends of said arms.

7. In a photograph printing machine of the type described, the combination of the negative holding frame provided with an opening which extends through said frame,, a presser plate movably mounted 1n said opening, and meansfor imparting movement thereto, said means comprising a shaft, a cam thereon, pivoted levers, a projection thereon which projects into the path of travel of said cam, rods which connect the upper ends of said levers with rigid projections on said presser plate, and means for adjusting the movement imparted to said Presser plate by said cam substantially as described. j

8. In a photographic printing machine of the type described, the combination of the negative holding frame provided with an opening which extends through said frame, a presser plate movably mounted in said opening, and means for imparting movement th eretr id means comprising a shaft, a cam there pivoted levers, a projection thereon which projects into the path of travel of said cam, rods which connect the upper ends of'said levers with rigid projections on said presser plate, means for adjusting the movement imparted to said presser plate by said cam, said means comprising studs rotatably mounted in said levers which extend through slots formed lengthwise in the. rods connected to said presser plate, and clamping means for securing said studs in adjusted positions in said slots, substantially as described.

In testimony that I claim the foregoing as my invention, I afiix-my signature in presence of two subscribing witnesses this 

